Improvement in glass pistons and their packings for pumps



A4. E. GAY. Glass Pistons and their Packings for Pumps. 10.140,697.

' Patented July 8,1873.

UNITED STATEs PATENT OEErcE.

AETHUE E. GAY, 0E NAsHUA, NEw HAMrsHIEE.

IMPROVEMENT IN GLASSPISTO'NS AND THEIR PACKINGS FOR PUMPS.

Specification forming part of Letters Patent No. 140,697, dated July 8, 1873; application filed May 24, 1873.

To all whom it may concern:

Be it known that I, ARTHUR E. GAY, of Nashua, in the county of Hillsborough and State of New Hampshire, have invented a new and valuable Improvement in GlassPiston and its Packing for Pumps; and I do hereby declare that the following is a full, clear, and exact description ofthe construction and operation of the same, reference being had to the annexed drawings making a part of this specification, and to the letters and igures of reference marked thereon.

The iigure of the drawing is a representation of my invention by a vertical central sectional view.

My invention relates to pumps; and it consists of a novel construction and arrangement of the piston and its packing, the piston being of glass, and the packing being made stationary between the joints of a divided pump-cylinder, which allows a loose fit of the piston. The object of my invention is to have a piston of very hard and smooth bearingsurface, and of material which does neither rot nor corrode, and to have a very durable and easy packing, so located that it is accessible without hard work.

In the drawings, A represents a cylindrical glass piston fastened to the pump-rod B by two cross-braces, C D, and a nut, d. The upper cross-bar G is rigidly fastened to the pump-rod D, while the pump-rod passes through the lower cross-bar C, and with a nut is drawn on the glass piston, which is thereby clamped between the bars (l and D. Between the cross-bar C and the glass piston A a circular piece of leather, E, is clamped, which carries the valve-weights e, and serves as valve-packing and flexible valve-hinge. The piston-packing consists of a leather or India-rubber washer, F, or a washer of ilexible material or composition, which is not easily affected by an overbalance of acidity or alkilinity or other destructive property'of the various admixtures of spring-water. This is placed between the joints of the pump-chamber, which consists of two equal parts, Gr and H, so that the said packing occupies a central position in the pump-chamber and on the piston. The free part of the said packing is conically sloped up toward the piston, and thereby forms a trap for the water above.

The pump-valve I is attached to the top of v the suction-pipe J, which is nicely fitted into the lower part of the pump-chamber. `The two cylinders G and H, which constitute the pump-chamber, are securely coupled with cleats or other suitable couplings K.

The operation of this pump is simple and not based on any new principles, and, therefore, its description is non-essential to this specification.

The described construction of my pump is designed to make it a very valuable implement in regard to cheapness, durability, and facility of operation, as it consists of very few parts of Very simple construction, and as the friction of the piston is reduced to a minimum, as well as its liability to derangement.

The glass piston highly recommends itself for the elevation of acid or otherwise corrosive iluids, as a non-destructible and easilyoperating piston, superseding in those qualities all other compositions or devices for protection of wearing-surfaces.

What I claim as new, and desire to secure by Letters Patent, is-

In a pump, the glass piston A and its packing E, cross-bars U D, pump-rod B, and nut d, substantially as specilied.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses. Y

ARTHUR E. GAY.

Witnesses HENRY H. DAVIS, A. MCKEAN.

i N l 

